Malicious PDF — malware analysis report

Static analysis result for SHA-256 528477cb9834a6a8…

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 02:03:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42b36483574360a220fa0cf636f2411f SHA-1: c05646e8f578f194afdfbe86274dfc370b3a4484 SHA-256: 528477cb9834a6a8559905370e8ddc7439a98d0dfd5147a1b3915e54410ec4e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9299

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-robux-instantly-game-hack PDF link annotation
    • http://ce-tsv-nantes.fr/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/robux-come_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.nrzroblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49ED 27396 bytes
SHA-256: 190ad729043ffe7358359322de19f33df429c5e79669cac25b8f85f8ca3a5661
font_01_sfnt_off000087f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 2976 bytes
SHA-256: b7daa4357130991615914848b8ce5643769015a04fdd9df8d32cdb0725619d84
font_02_sfnt_off00009233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9233 18600 bytes
SHA-256: eeb00711cf2e5591db958639ea5d908a8ba1b5c4404aa75c69e8a5349c023cb9

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